Multipin connector

Abstract

A multiple connector has an insulating body which contains a plurality of pin contacts arranged in rows and columns of a matrix. The insulating body is inserted securely in the front end portion of a cylindrical metal shielding body. Front end faces of contact holding plates holding these pin contacts in a row or a column arrangment are held in abutment with the rear face of the insulating body. The contact holding plates respectively have contact holding grooves formed therein to extend in a front and rear direction. Cord connection portions of the pin contacts extending or projecting from the rear face of the insulation body are pressed into and secured to these contact holding grooves. The cord connection portion has a press-in contact portion formed integrally therein and the press-in contact portion has a slot of a width smaller than the diameter of a core bundle of the cord to be connected. When a covered cord is pressed into the slot, the cover is torn and edges of the slot intrude into the core bundle. An engagement piece is formed at the middle portion of the pin contact. When the pin contact is inserted into the contact housing hole, the engagement piece engages with a stepped portion formed on an inner wall of the contact housing hole, so that the contact holding plate and the insulation body are engaged through the pin contact.

What is claimed is: 
     
       1. A multipin connector comprising: a square-shaped insulation body having a plurality of contact housing holes extending along a front and rear direction through said insulation body, said contact housing holes being arranged in rows and columns,   a plurality of pin contacts provided with front portions of pins projecting forward from said insulation body and rear portions of cord connection portions projecting rearward from said insulation body, said pin contacts being inserted through each contact housing hole formed in the insulation body,   a cylindrical metal shielding body having a front portion into which said insulation body is inserted and secured thereto and a rear portion provided with a cable lead-out opening,   contact holding plates each of which is provided for a corresponding one of said rows or columns of contact housing holes, each said contact holding plate being made of an insulating material and having contact holding grooves formed on a face of the contact holding plate to extend in a front and rear direction to face said contact housing holes, said cord connection portions of said pin contacts in each row or column being pressed into and secured to the contact holding grooves of a corresponding one of said contact holding plates,   press-in contact portions formed integrally with the cord connection portions, said press-in contact portions having conductive plates each of which extends substantially perpendicularly to the front and rear direction of the cord connection portion and has a slot of a width smaller than the diameter of a core bundle of a cord, so that a covered cord is pressed into the slot, tearing the cover to make the core bundle in contact with edges of the slot, and   engagement pieces provided at middle portions of said pin contacts so as to engage with stepped portions formed on the inner walls of said contact housing holes, whereby when the pin contacts are inserted to the contact housing holes, said pin contacts and the contact holding plates are firmly held in the insulation body.   
     
     
       2. The multipin connector according to claim 1, wherein the thickness of said contact holding plate is determined so as to be identical substantially with the arrangement pitch of said contact housing holes and the insulation body has a pair of projections projected from the rear face of the insulation body, which projections are formed so as to sandwich two ends of assembled contact holding plates, these ends being situated along the assembling direction of the contact holding plates.   
     
     
       3. The multipin connector according to claim 1, wherein the cord connection portions of the pin contacts have strip-like base portions provided with projections at two sides of a part of the base portion, said part is situated at a front end and a rear end of said cord connection portion, and said projections are pressed and secured to front and rear end projections of the contact holding groove.   
     
     
       4. The multipin connector according to claim 3, wherein the portions of the contact holding groove into which the projections are pressed-in are made narrow.   
     
     
       5. The multipin connector according to claim 1, wherein the cord connection portion of the pin contact has strip-like base portions, a part of the one side of the base plate portion is bent at a right angle so as to form a side plate extending in a front and rear direction, an end of the part of the side of the base plate portion is further bent at a right angle so as to form a conductive plate erected on the base plate portion perpendicular to the base plate portion, and a slot is formed in the conductive plate to extend toward said base plate portion in order to form the press-in contact portion.   
     
     
       6. The multipin connector according to claim 5, wherein a plurality of press-in contact portions consisting of a side plate integral with said base plate portion and said conductive plate are arranged longitudinally.   
     
     
       7. The multipin connector according to claim 5, wherein another side plate confronting said side plate is formed integrally from the other side of the base plate portion, and mutual confronting parts of these sides plates are pressed inwardly mutually in order to form a clamp portion, so that the clamp portion holds the cord to be connected.